Portion of a speaker housing



FIG. 1 is a perspective view of a portion of a speaker housing showing my new design;

FIG. 2 is a top plan thereof; and,

FIG. 3 is a front elevational view thereof.

The broken line oval immediately adjacent to the shaded areas on FIGS. 1-3 represents the bounds of the claimed design and form no part thereof. The broken line showing of the speaker housing in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a speaker housing, as shown and described. 